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fa126c |
/* Code to save the xtables state, in human readable-form. */
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fa126c |
/* (C) 1999 by Paul 'Rusty' Russell <rusty@rustcorp.com.au> and
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fa126c |
* (C) 2000-2002 by Harald Welte <laforge@gnumonks.org>
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fa126c |
* (C) 2012 by Pablo Neira Ayuso <pablo@netfilter.org>
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fa126c |
*
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fa126c |
* This code is distributed under the terms of GNU GPL v2
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fa126c |
*
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fa126c |
*/
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fa126c |
#include <getopt.h>
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fa126c |
#include <errno.h>
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fa126c |
#include <stdio.h>
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fa126c |
#include <fcntl.h>
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fa126c |
#include <stdlib.h>
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fa126c |
#include <string.h>
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fa126c |
#include <time.h>
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fa126c |
#include <netdb.h>
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fa126c |
#include <unistd.h>
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fa126c |
#include "libiptc/libiptc.h"
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fa126c |
#include "iptables.h"
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fa126c |
#include "xtables-multi.h"
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fa126c |
#include "nft.h"
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fa126c |
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fa126c |
#include <libnftnl/chain.h>
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fa126c |
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fa126c |
#ifndef NO_SHARED_LIBS
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fa126c |
#include <dlfcn.h>
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fa126c |
#endif
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fa126c |
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fa126c |
#define prog_name xtables_globals.program_name
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fa126c |
#define prog_vers xtables_globals.program_version
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fa126c |
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fa126c |
static bool show_counters = false;
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fa126c |
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fa126c |
static const struct option options[] = {
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fa126c |
{.name = "counters", .has_arg = false, .val = 'c'},
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fa126c |
{.name = "version", .has_arg = false, .val = 'V'},
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fa126c |
{.name = "dump", .has_arg = false, .val = 'd'},
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fa126c |
{.name = "table", .has_arg = true, .val = 't'},
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fa126c |
{.name = "modprobe", .has_arg = true, .val = 'M'},
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fa126c |
{.name = "file", .has_arg = true, .val = 'f'},
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fa126c |
{.name = "ipv4", .has_arg = false, .val = '4'},
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fa126c |
{.name = "ipv6", .has_arg = false, .val = '6'},
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fa126c |
{NULL},
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fa126c |
};
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fa126c |
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fa126c |
static const struct option arp_save_options[] = {
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fa126c |
{.name = "counters", .has_arg = false, .val = 'c'},
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fa126c |
{.name = "version", .has_arg = false, .val = 'V'},
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fa126c |
{.name = "modprobe", .has_arg = true, .val = 'M'},
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fa126c |
{NULL},
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fa126c |
};
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fa126c |
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fa126c |
static const struct option ebt_save_options[] = {
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fa126c |
{.name = "counters", .has_arg = false, .val = 'c'},
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fa126c |
{.name = "version", .has_arg = false, .val = 'V'},
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fa126c |
{.name = "table", .has_arg = true, .val = 't'},
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fa126c |
{.name = "modprobe", .has_arg = true, .val = 'M'},
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fa126c |
{NULL},
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fa126c |
};
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fa126c |
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fa126c |
static bool ebt_legacy_counter_format;
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fa126c |
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fa126c |
static int
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fa126c |
__do_output(struct nft_handle *h, const char *tablename, bool counters)
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fa126c |
{
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fa126c |
struct nftnl_chain_list *chain_list;
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fa126c |
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fa126c |
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fa126c |
if (!nft_is_table_compatible(h, tablename)) {
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fa126c |
if (!nft_table_builtin_find(h, tablename))
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fa126c |
printf("# Table `%s' is incompatible, use 'nft' tool.\n",
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fa126c |
tablename);
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fa126c |
return 0;
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fa126c |
}
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fa126c |
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fa126c |
chain_list = nft_chain_list_get(h);
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fa126c |
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fa126c |
time_t now = time(NULL);
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fa126c |
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fa126c |
printf("# Generated by xtables-save v%s on %s",
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fa126c |
IPTABLES_VERSION, ctime(&now));
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fa126c |
printf("*%s\n", tablename);
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fa126c |
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fa126c |
/* Dump out chain names first,
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fa126c |
* thereby preventing dependency conflicts */
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fa126c |
nft_chain_save(h, chain_list, tablename);
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fa126c |
nft_rule_save(h, tablename, counters ? 0 : FMT_NOCOUNTS);
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fa126c |
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fa126c |
now = time(NULL);
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fa126c |
printf("COMMIT\n");
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fa126c |
printf("# Completed on %s", ctime(&now));
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fa126c |
return 0;
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fa126c |
}
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fa126c |
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fa126c |
static int
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fa126c |
do_output(struct nft_handle *h, const char *tablename, bool counters)
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fa126c |
{
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fa126c |
int ret;
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fa126c |
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fa126c |
if (!tablename) {
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fa126c |
ret = nft_for_each_table(h, __do_output, counters);
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fa126c |
nft_check_xt_legacy(h->family, true);
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fa126c |
return !!ret;
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fa126c |
}
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fa126c |
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fa126c |
if (!nft_table_find(h, tablename)) {
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fa126c |
printf("Table `%s' does not exist\n", tablename);
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fa126c |
return 1;
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fa126c |
}
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fa126c |
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fa126c |
ret = __do_output(h, tablename, counters);
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fa126c |
nft_check_xt_legacy(h->family, true);
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fa126c |
return ret;
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fa126c |
}
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fa126c |
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fa126c |
/* Format:
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fa126c |
* :Chain name POLICY packets bytes
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fa126c |
* rule
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fa126c |
*/
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fa126c |
static int
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fa126c |
xtables_save_main(int family, const char *progname, int argc, char *argv[])
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fa126c |
{
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fa126c |
struct builtin_table *tables;
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fa126c |
const char *tablename = NULL;
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fa126c |
bool dump = false;
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fa126c |
struct nft_handle h = {
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fa126c |
.family = family,
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fa126c |
};
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fa126c |
FILE *file = NULL;
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fa126c |
int ret, c;
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fa126c |
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fa126c |
xtables_globals.program_name = progname;
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fa126c |
c = xtables_init_all(&xtables_globals, family);
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fa126c |
if (c < 0) {
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fa126c |
fprintf(stderr, "%s/%s Failed to initialize xtables\n",
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fa126c |
xtables_globals.program_name,
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fa126c |
xtables_globals.program_version);
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fa126c |
exit(1);
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fa126c |
}
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fa126c |
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fa126c |
while ((c = getopt_long(argc, argv, "bcdt:M:f:46V", options, NULL)) != -1) {
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fa126c |
switch (c) {
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fa126c |
case 'b':
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fa126c |
fprintf(stderr, "-b/--binary option is not implemented\n");
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fa126c |
break;
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fa126c |
case 'c':
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fa126c |
show_counters = true;
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fa126c |
break;
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fa126c |
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fa126c |
case 't':
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fa126c |
/* Select specific table. */
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fa126c |
tablename = optarg;
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fa126c |
break;
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fa126c |
case 'M':
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fa126c |
xtables_modprobe_program = optarg;
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fa126c |
break;
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fa126c |
case 'f':
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fa126c |
file = fopen(optarg, "w");
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fa126c |
if (file == NULL) {
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fa126c |
fprintf(stderr, "Failed to open file, error: %s\n",
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fa126c |
strerror(errno));
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fa126c |
exit(1);
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fa126c |
}
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fa126c |
ret = dup2(fileno(file), STDOUT_FILENO);
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fa126c |
if (ret == -1) {
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fa126c |
fprintf(stderr, "Failed to redirect stdout, error: %s\n",
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Packit Service |
fa126c |
strerror(errno));
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Packit Service |
fa126c |
exit(1);
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|
Packit Service |
fa126c |
}
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Packit Service |
fa126c |
fclose(file);
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Packit Service |
fa126c |
break;
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|
Packit Service |
fa126c |
case 'd':
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Packit Service |
fa126c |
dump = true;
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Packit Service |
fa126c |
break;
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Packit Service |
fa126c |
case '4':
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|
Packit Service |
fa126c |
h.family = AF_INET;
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|
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fa126c |
break;
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|
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fa126c |
case '6':
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|
Packit Service |
fa126c |
h.family = AF_INET6;
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|
Packit Service |
fa126c |
xtables_set_nfproto(AF_INET6);
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|
Packit Service |
fa126c |
break;
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|
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fa126c |
case 'V':
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fa126c |
printf("%s v%s (nf_tables)\n", prog_name, prog_vers);
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fa126c |
exit(0);
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|
Packit Service |
fa126c |
default:
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|
Packit Service |
fa126c |
fprintf(stderr,
|
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fa126c |
"Look at manual page `xtables-save.8' for more information.\n");
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|
Packit Service |
fa126c |
exit(1);
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|
Packit Service |
fa126c |
}
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|
Packit Service |
fa126c |
}
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fa126c |
|
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Packit Service |
fa126c |
if (optind < argc) {
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|
Packit Service |
fa126c |
fprintf(stderr, "Unknown arguments found on commandline\n");
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Packit Service |
fa126c |
exit(1);
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|
Packit Service |
fa126c |
}
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|
Packit Service |
fa126c |
|
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Packit Service |
fa126c |
switch (family) {
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Packit Service |
fa126c |
case NFPROTO_IPV4:
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|
Packit Service |
fa126c |
case NFPROTO_IPV6: /* fallthough, same table */
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|
Packit Service |
fa126c |
#if defined(ALL_INCLUSIVE) || defined(NO_SHARED_LIBS)
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|
Packit Service |
fa126c |
init_extensions();
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|
Packit Service |
fa126c |
init_extensions4();
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|
Packit Service |
fa126c |
#endif
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Packit Service |
fa126c |
tables = xtables_ipv4;
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|
Packit Service |
fa126c |
break;
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|
Packit Service |
fa126c |
case NFPROTO_ARP:
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|
Packit Service |
fa126c |
tables = xtables_arp;
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|
Packit Service |
fa126c |
break;
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|
Packit Service |
fa126c |
case NFPROTO_BRIDGE:
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|
Packit Service |
fa126c |
tables = xtables_bridge;
|
|
Packit Service |
fa126c |
break;
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|
Packit Service |
fa126c |
default:
|
|
Packit Service |
fa126c |
fprintf(stderr, "Unknown family %d\n", family);
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|
Packit Service |
fa126c |
return 1;
|
|
Packit Service |
fa126c |
}
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|
Packit Service |
fa126c |
|
|
Packit Service |
fa126c |
if (nft_init(&h, tables) < 0) {
|
|
Packit Service |
fa126c |
fprintf(stderr, "%s/%s Failed to initialize nft: %s\n",
|
|
Packit Service |
fa126c |
xtables_globals.program_name,
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|
Packit Service |
fa126c |
xtables_globals.program_version,
|
|
Packit Service |
fa126c |
strerror(errno));
|
|
Packit Service |
fa126c |
exit(EXIT_FAILURE);
|
|
Packit Service |
fa126c |
}
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|
Packit Service |
fa126c |
|
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Packit Service |
fa126c |
ret = do_output(&h, tablename, show_counters);
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|
Packit Service |
fa126c |
nft_fini(&h);
|
|
Packit Service |
fa126c |
if (dump)
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|
Packit Service |
fa126c |
exit(0);
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|
Packit Service |
fa126c |
|
|
Packit Service |
fa126c |
return ret;
|
|
Packit Service |
fa126c |
}
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|
Packit Service |
fa126c |
|
|
Packit Service |
fa126c |
int xtables_ip4_save_main(int argc, char *argv[])
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|
Packit Service |
fa126c |
{
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|
Packit Service |
fa126c |
return xtables_save_main(NFPROTO_IPV4, "iptables-save", argc, argv);
|
|
Packit Service |
fa126c |
}
|
|
Packit Service |
fa126c |
|
|
Packit Service |
fa126c |
int xtables_ip6_save_main(int argc, char *argv[])
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|
Packit Service |
fa126c |
{
|
|
Packit Service |
fa126c |
return xtables_save_main(NFPROTO_IPV6, "ip6tables-save", argc, argv);
|
|
Packit Service |
fa126c |
}
|
|
Packit Service |
fa126c |
|
|
Packit Service |
fa126c |
static int __ebt_save(struct nft_handle *h, const char *tablename, bool counters)
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|
Packit Service |
fa126c |
{
|
|
Packit Service |
fa126c |
struct nftnl_chain_list *chain_list;
|
|
Packit Service |
fa126c |
unsigned int format = FMT_NOCOUNTS;
|
|
Packit Service |
fa126c |
static bool first = true;
|
|
Packit Service |
fa126c |
time_t now;
|
|
Packit Service |
fa126c |
|
|
Packit Service |
fa126c |
if (!nft_table_find(h, tablename)) {
|
|
Packit Service |
fa126c |
printf("Table `%s' does not exist\n", tablename);
|
|
Packit Service |
fa126c |
return 1;
|
|
Packit Service |
fa126c |
}
|
|
Packit Service |
fa126c |
|
|
Packit Service |
fa126c |
if (!nft_is_table_compatible(h, tablename)) {
|
|
Packit Service |
fa126c |
printf("# Table `%s' is incompatible, use 'nft' tool.\n", tablename);
|
|
Packit Service |
fa126c |
return 0;
|
|
Packit Service |
fa126c |
}
|
|
Packit Service |
fa126c |
|
|
Packit Service |
fa126c |
chain_list = nft_chain_list_get(h);
|
|
Packit Service |
fa126c |
|
|
Packit Service |
fa126c |
if (first) {
|
|
Packit Service |
fa126c |
now = time(NULL);
|
|
Packit Service |
fa126c |
printf("# Generated by ebtables-save v%s on %s",
|
|
Packit Service |
fa126c |
IPTABLES_VERSION, ctime(&now));
|
|
Packit Service |
fa126c |
first = false;
|
|
Packit Service |
fa126c |
}
|
|
Packit Service |
fa126c |
printf("*%s\n", tablename);
|
|
Packit Service |
fa126c |
|
|
Packit Service |
fa126c |
if (counters)
|
|
Packit Service |
fa126c |
format = ebt_legacy_counter_format ? FMT_EBT_SAVE : 0;
|
|
Packit Service |
fa126c |
|
|
Packit Service |
fa126c |
/* Dump out chain names first,
|
|
Packit Service |
fa126c |
* thereby preventing dependency conflicts */
|
|
Packit Service |
fa126c |
nft_chain_save(h, chain_list, tablename);
|
|
Packit Service |
fa126c |
nft_rule_save(h, tablename, format);
|
|
Packit Service |
fa126c |
printf("\n");
|
|
Packit Service |
fa126c |
return 0;
|
|
Packit Service |
fa126c |
}
|
|
Packit Service |
fa126c |
|
|
Packit Service |
fa126c |
static int ebt_save(struct nft_handle *h, const char *tablename, bool counters)
|
|
Packit Service |
fa126c |
{
|
|
Packit Service |
fa126c |
if (!tablename)
|
|
Packit Service |
fa126c |
return nft_for_each_table(h, __ebt_save, counters);
|
|
Packit Service |
fa126c |
|
|
Packit Service |
fa126c |
return __ebt_save(h, tablename, counters);
|
|
Packit Service |
fa126c |
}
|
|
Packit Service |
fa126c |
|
|
Packit Service |
fa126c |
int xtables_eb_save_main(int argc_, char *argv_[])
|
|
Packit Service |
fa126c |
{
|
|
Packit Service |
fa126c |
const char *ctr = getenv("EBTABLES_SAVE_COUNTER");
|
|
Packit Service |
fa126c |
const char *tablename = NULL;
|
|
Packit Service |
fa126c |
struct nft_handle h = {
|
|
Packit Service |
fa126c |
.family = NFPROTO_BRIDGE,
|
|
Packit Service |
fa126c |
};
|
|
Packit Service |
fa126c |
int c;
|
|
Packit Service |
fa126c |
|
|
Packit Service |
fa126c |
if (ctr) {
|
|
Packit Service |
fa126c |
if (strcmp(ctr, "yes") == 0) {
|
|
Packit Service |
fa126c |
ebt_legacy_counter_format = true;
|
|
Packit Service |
fa126c |
show_counters = true;
|
|
Packit Service |
fa126c |
}
|
|
Packit Service |
fa126c |
}
|
|
Packit Service |
fa126c |
|
|
Packit Service |
fa126c |
xtables_globals.program_name = "ebtables-save";
|
|
Packit Service |
fa126c |
c = xtables_init_all(&xtables_globals, h.family);
|
|
Packit Service |
fa126c |
if (c < 0) {
|
|
Packit Service |
fa126c |
fprintf(stderr, "%s/%s Failed to initialize xtables\n",
|
|
Packit Service |
fa126c |
xtables_globals.program_name,
|
|
Packit Service |
fa126c |
xtables_globals.program_version);
|
|
Packit Service |
fa126c |
exit(1);
|
|
Packit Service |
fa126c |
}
|
|
Packit Service |
fa126c |
|
|
Packit Service |
fa126c |
while ((c = getopt_long(argc_, argv_, "ct:M:V", ebt_save_options, NULL)) != -1) {
|
|
Packit Service |
fa126c |
switch (c) {
|
|
Packit Service |
fa126c |
case 'c':
|
|
Packit Service |
fa126c |
unsetenv("EBTABLES_SAVE_COUNTER");
|
|
Packit Service |
fa126c |
show_counters = true;
|
|
Packit Service |
fa126c |
ebt_legacy_counter_format = false;
|
|
Packit Service |
fa126c |
break;
|
|
Packit Service |
fa126c |
case 't':
|
|
Packit Service |
fa126c |
/* Select specific table. */
|
|
Packit Service |
fa126c |
tablename = optarg;
|
|
Packit Service |
fa126c |
break;
|
|
Packit Service |
fa126c |
case 'M':
|
|
Packit Service |
fa126c |
xtables_modprobe_program = optarg;
|
|
Packit Service |
fa126c |
break;
|
|
Packit Service |
fa126c |
case 'V':
|
|
Packit Service |
fa126c |
printf("%s v%s (nf_tables)\n", prog_name, prog_vers);
|
|
Packit Service |
fa126c |
exit(0);
|
|
Packit Service |
fa126c |
default:
|
|
Packit Service |
fa126c |
fprintf(stderr,
|
|
Packit Service |
fa126c |
"Look at manual page `xtables-save.8' for more information.\n");
|
|
Packit Service |
fa126c |
exit(1);
|
|
Packit Service |
fa126c |
}
|
|
Packit Service |
fa126c |
}
|
|
Packit Service |
fa126c |
|
|
Packit Service |
fa126c |
if (nft_init(&h, xtables_bridge) < 0) {
|
|
Packit Service |
fa126c |
fprintf(stderr, "%s/%s Failed to initialize nft: %s\n",
|
|
Packit Service |
fa126c |
xtables_globals.program_name,
|
|
Packit Service |
fa126c |
xtables_globals.program_version,
|
|
Packit Service |
fa126c |
strerror(errno));
|
|
Packit Service |
fa126c |
exit(EXIT_FAILURE);
|
|
Packit Service |
fa126c |
}
|
|
Packit Service |
fa126c |
|
|
Packit Service |
fa126c |
ebt_save(&h, tablename, show_counters);
|
|
Packit Service |
fa126c |
nft_fini(&h);
|
|
Packit Service |
fa126c |
return 0;
|
|
Packit Service |
fa126c |
}
|
|
Packit Service |
fa126c |
|
|
Packit Service |
fa126c |
int xtables_arp_save_main(int argc, char **argv)
|
|
Packit Service |
fa126c |
{
|
|
Packit Service |
fa126c |
struct nft_handle h = {
|
|
Packit Service |
fa126c |
.family = NFPROTO_ARP,
|
|
Packit Service |
fa126c |
};
|
|
Packit Service |
fa126c |
int c;
|
|
Packit Service |
fa126c |
|
|
Packit Service |
fa126c |
xtables_globals.program_name = "arptables-save";
|
|
Packit Service |
fa126c |
c = xtables_init_all(&xtables_globals, h.family);
|
|
Packit Service |
fa126c |
if (c < 0) {
|
|
Packit Service |
fa126c |
fprintf(stderr, "%s/%s Failed to initialize xtables\n",
|
|
Packit Service |
fa126c |
xtables_globals.program_name,
|
|
Packit Service |
fa126c |
xtables_globals.program_version);
|
|
Packit Service |
fa126c |
exit(1);
|
|
Packit Service |
fa126c |
}
|
|
Packit Service |
fa126c |
|
|
Packit Service |
fa126c |
while ((c = getopt_long(argc, argv, "cM:V", arp_save_options, NULL)) != -1) {
|
|
Packit Service |
fa126c |
switch (c) {
|
|
Packit Service |
fa126c |
case 'c':
|
|
Packit Service |
fa126c |
show_counters = true;
|
|
Packit Service |
fa126c |
break;
|
|
Packit Service |
fa126c |
case 'M':
|
|
Packit Service |
fa126c |
xtables_modprobe_program = optarg;
|
|
Packit Service |
fa126c |
break;
|
|
Packit Service |
fa126c |
case 'V':
|
|
Packit Service |
fa126c |
printf("%s v%s (nf_tables)\n", prog_name, prog_vers);
|
|
Packit Service |
fa126c |
exit(0);
|
|
Packit Service |
fa126c |
default:
|
|
Packit Service |
fa126c |
fprintf(stderr,
|
|
Packit Service |
fa126c |
"Look at manual page `xtables-save.8' for more information.\n");
|
|
Packit Service |
fa126c |
exit(1);
|
|
Packit Service |
fa126c |
}
|
|
Packit Service |
fa126c |
}
|
|
Packit Service |
fa126c |
|
|
Packit Service |
fa126c |
if (nft_init(&h, xtables_arp) < 0) {
|
|
Packit Service |
fa126c |
fprintf(stderr, "%s/%s Failed to initialize nft: %s\n",
|
|
Packit Service |
fa126c |
xtables_globals.program_name,
|
|
Packit Service |
fa126c |
xtables_globals.program_version,
|
|
Packit Service |
fa126c |
strerror(errno));
|
|
Packit Service |
fa126c |
exit(EXIT_FAILURE);
|
|
Packit Service |
fa126c |
}
|
|
Packit Service |
fa126c |
|
|
Packit Service |
fa126c |
if (!nft_table_find(&h, "filter"))
|
|
Packit Service |
fa126c |
return 0;
|
|
Packit Service |
fa126c |
|
|
Packit Service |
fa126c |
if (!nft_is_table_compatible(&h, "filter")) {
|
|
Packit Service |
fa126c |
printf("# Table `filter' is incompatible, use 'nft' tool.\n");
|
|
Packit Service |
fa126c |
return 0;
|
|
Packit Service |
fa126c |
}
|
|
Packit Service |
fa126c |
|
|
Packit Service |
fa126c |
printf("*filter\n");
|
|
Packit Service |
fa126c |
nft_chain_save(&h, nft_chain_list_get(&h), "filter");
|
|
Packit Service |
fa126c |
nft_rule_save(&h, "filter", show_counters ? 0 : FMT_NOCOUNTS);
|
|
Packit Service |
fa126c |
printf("\n");
|
|
Packit Service |
fa126c |
nft_fini(&h);
|
|
Packit Service |
fa126c |
return 0;
|
|
Packit Service |
fa126c |
}
|